Fix overwritting downloaded files with same name

CHANGELOG.md

@@ -25,7 +25,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed an issue where opening a library from the recent libraries menu was not possible. [#5939](https://github.com/JabRef/jabref/issues/5939)
 - We fixed an issue with inconsistent capitalization of file extensions when downloading files [#6115](https://github.com/JabRef/jabref/issues/6115)
 - We fixed the display of language and encoding in the preferences dialog. [#6130](https://github.com/JabRef/jabref/pull/6130)
-
+- We fixed an issue where search full-text documents downloaded files with same name, overwriting existing files. [#6174](https://github.com/JabRef/jabref/pull/6174)
 ### Removed
 
 - We removed the obsolete `External programs / Open PDF` section in the preferences, as the default application to open PDFs is now set in the `Manage external file types` dialog. [#6130](https://github.com/JabRef/jabref/pull/6130)

src/main/java/org/jabref/gui/fieldeditors/LinkedFileViewModel.java

@@ -38,6 +38,7 @@
 import org.jabref.logic.externalfiles.LinkedFileHandler;
 import org.jabref.logic.l10n.Localization;
 import org.jabref.logic.net.URLDownload;
+import org.jabref.logic.util.io.FileNameUniqueness;
 import org.jabref.logic.xmp.XmpPreferences;
 import org.jabref.logic.xmp.XmpUtilWriter;
 import org.jabref.model.database.BibDatabaseContext;
@@ -419,6 +420,7 @@ public BackgroundTask<Path> prepareDownloadTask(Path targetDirectory, URLDownloa
  String suggestedTypeName = externalFileType.getName();
  linkedFile.setFileType(suggestedTypeName);
  String suggestedName = linkedFileHandler.getSuggestedFileName(externalFileType.getExtension());
+ suggestedName = FileNameUniqueness.getNonOverWritingFileName(targetDirectory, suggestedName);
  return targetDirectory.resolve(suggestedName);
  })
  .then(destination -> new FileDownloadTask(urlDownload.getSource(), destination))

src/main/java/org/jabref/logic/util/io/FileNameUniqueness.java

@@ -0,0 +1,49 @@
+package org.jabref.logic.util.io;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Optional;
+
+public class FileNameUniqueness {
+
+ /**
+ * Returns an absolute path to a file which does not match with any existing file names
+ *
+ * @param targetDirectory The directory in which file name should be unique
+ * @param fileName Suggested name for the file
+ * @return a file-name such that it does not match any existing files in targetDirectory.
+ * */
+ public static String getNonOverWritingFileName(Path targetDirectory, String fileName) {
+// String absoluteName = targetDirectory.resolve(fileName)
+// .toString();
+
+ Optional<String> extensionOptional = FileUtil.getFileExtension(fileName);
+
+ // the suffix include the '.' , if extension is present Eg: ".pdf"
+ String extensionSuffix;
+ String fileNameWithoutExtension;
+
+ if (extensionOptional.isPresent()) {
+ extensionSuffix = '.' + extensionOptional.get();
+ fileNameWithoutExtension = fileName.substring(0, fileName.lastIndexOf('.'));
+ }
+ else {
+ extensionSuffix = "";
+ fileNameWithoutExtension = fileName;
+ }
+
+// Path absolutePath = Paths.get(absoluteName);
+ String newFileName = fileName;
+
+ int counter = 1;
+ while ( Files.exists(
+ targetDirectory.resolve(newFileName))
+ ) {
+ newFileName = fileNameWithoutExtension +
+ " (" + counter + ")" +
+ extensionSuffix;
+ counter++;
+ }
+ return newFileName;
+ }
+}

src/test/java/org/jabref/logic/util/io/FileNameUniquenessTest.java

@@ -0,0 +1,56 @@
+package org.jabref.logic.util.io;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+public class FileNameUniquenessTest {
+
+ @TempDir
+ protected Path tempDir;
+
+ @Test
+ public void testGetNonOverWritingFileNameReturnsSameName(@TempDir Path tempDirectory) throws IOException {
+
+ assertFalse(
+ Files.exists(tempDirectory.resolve("sameFile.txt"))
+ );
+
+ String outputFileName = FileNameUniqueness.getNonOverWritingFileName(tempDirectory, "sameFile.txt");
+ assertEquals("sameFile.txt", outputFileName);
+
+ }
+
+ @Test
+ public void testGetNonOverWritingFileNameReturnsUniqueNameOver1Conflict() throws IOException {
+ Path dummyFilePath1 = tempDir.resolve("differentFile.txt");
+
+ Files.createFile(dummyFilePath1);
+
+ String outputFileName = FileNameUniqueness.getNonOverWritingFileName(tempDir, "differentFile.txt");
+ assertEquals("differentFile (1).txt", outputFileName);
+
+ Files.delete(dummyFilePath1);
+ }
+
+ @Test
+ public void testGetNonOverWritingFileNameReturnsUniqueNameOverNConflicts() throws IOException {
+ Path dummyFilePath1 = tempDir.resolve("manyfiles.txt");
+ Path dummyFilePath2 = tempDir.resolve("manyfiles (1).txt");
+
+ Files.createFile(dummyFilePath1);
+ Files.createFile(dummyFilePath2);
+
+ String outputFileName = FileNameUniqueness.getNonOverWritingFileName(tempDir, "manyfiles.txt");
+ assertEquals("manyfiles (2).txt", outputFileName);
+
+ Files.delete(dummyFilePath1);
+ Files.delete(dummyFilePath2);
+ }
+}